Polishing wheel



Jan. 29, 1952 J. F. couL'rlER ETAL 2,583,632

POLISHNG WHEEL.

Filed May 21. 1948 INVENTORS, Jje fr Paal/zaza@ Patented `anl. 29, 1952 2,583,632 PoLIsHING WHEEL` Joseph F. Coultier, Birmingham, and Isabell J. Lupu, Lincoln Park, Mich.

Application May 21, 1948, Serial No. 28,328

7 Claims.

This invention generally relates to bung and polishing wheels and more particularly pertains to a bufling and polishing wheel assembly of exceptionally long-life characteristics comprising a rotatable core, polishing pads, and attaching keys for securing the pads to the core.

The principal object of the invention is to provide attaching keys which are quickly attachable and detachable to the core member for securing the polishing pads to the core member. The keys are first assembled to the pads and then locked in the core thereby securing the pads to the core.

Another object of the invention is to provide means for attaching the polishing `pads to the core member so that the pads are quickly and easily attached or detached individually with the operator handling only one pad and key at a time.

Another .object of the invention is to provide key-ways and recesses in the core which serve the dual purpose of co-acting with the attaching keys and of providing passages for movement of air under centrifugal force which movement of air ventilates the pads and eliminates whistling or humming.

A further object of the invention is to provide detachable securing means for attaching the pads to the core which are connected to the core at a point interiorly removed from the outer periphery of the core, and substantially within the core body. y

A still further object of the invention is to provide a cross-head on the connecting key of such length that the ends of each cross-head are proximate to the respective ends of the cross-heads which lie on either side of same thereby providing a segmental circumference of cross-heads surrounding the outer periphery of the core for the purpose of extending the base portion of the pads circumferentially around the core at its outer periphery to effect a full distribution of the pads at their working surface thereby providing an uninterrupted peripheral Working surface on the bulling wheel.

' A still further object of the invention is to prof vide `a polishing wheel which may be used in multiple units to furnish an enlarged working surface, which wheels, when placed in side by side relationship not only lock the attaching keys in their respective slots in the cores, but also position the crossheads on the keys in parallel relationship to the circumference of the cores which position fully extends the pads circumferentially of the core.

These and other objects will be more readily apparent from the following description, the appended claims, and the `attached drawings, in which:

Fig. l is a side view of a polishing wheel of the invention with several of the pads and keys removed therefrom to better illustrate the various parts of the invention;

Fig. 2 is a partial cross-sectional view of Fig. l

i taken on the line 2-2 thereof showing the key attachment more clearly between the pads and the core and the manner of placing several cores in side by side relationship to obtain an enlarged working" surface;

Fig. 3 is a partial cross-sectional view of Fig. 2 taken on the line 3 3 thereof showing the relation between the core, pads, and keys together with one manner of holding the pads in alignment;

Fig. 4 is a cross sectional view of Fig. 3 taken on the line 4--4 thereof illustrating the neck portion of the core key-way;

Fig. 5 is a perspective View of illustrating a modification;

Fig. 6 is a perspective view of an attaching key equipped with depending ends on the cross-head thereof for holding the pad in alignment; and

Fig. 'l is a face view of a polishing pad. showing the center reinforcing disc and the center aperture therein for receiving the neck portion of the key and the two side apertures for receiving positioning means to keep the pad in alignment.

Referring to the drawings, core member 20, Figs. 1 and 2, is axially mounted on any suitable rotatable shaft 2l which occasions the rotary movement of the core member 20 when powered, and is provided with radially disposed key-ways 22 which lead inwardly from the outer periphery of the core member 20 and terminate interiorly of same in recesses 23, while studs 24 are mounted on the outer periphery of the core member 20.

Key 25 is adapted to lie in the keyway 22 and recess 23 of the core member 20 Figs. 1 to 4 and comprises neck portion 26, locking head 21 and cross-head 28 which may optionally be formed with depending dogs 29, Fig. 6, or an arcuate head, Fig. 5 or both.

Polishing pad 30, Figs. 1, 2, 3 and 7, comprises eliptical or oval shaped portions 3| of fibrous material such as cloth, several layers deep, which portions 3| are secured together in their central area by stitching 32 or other suitable means and reinforcing element 33 may be utilized to strengthen this area by also stitching same to the portions 3l. The pad 30 has a central aperan attaching key Alocking-head 21 lies within the recess 23 ture 34 and two olf-center apertures 35 which are located on either side of the central aperture 34 and are so positioned that the longest diameter of the pad 3|] lies across the centers of the three apertures. In other words, the two side apertures 35 are positioned adjacent the long sides of the oval shaped portions 3l of the pad 3E. The pad is preferably oval in shape but may assume any suitablefshape. f

It can here be pointed out that if a key 25 of the type shown in Fig. 6 is employed equipped with depending dogs 29 for positioning the polishingpad 30 relative to the core member v20, the studs 24 ofthe core member 2l) are deleted from the core member 20; the dogs 29 and ,studs 24 being optional in the invention.

In assembling the polishing wheelfrom'its comt runthrough the key-way 22 in the core 20 until it lies in the area of the recess yZiisthen turned to lie in a plane parallel to the periphery of the core 20. This turning of the cross-head 25 rotates the neck portion 25 and the locking-head 21 connected thereto so that at right angles` to the' key-way 22 thereby securing the key 25 and pad 30 to the core 20.

23; the cross head "'The placing of the apertures 35 of the pad 35 over the studs 24 of the core member 21|) locates Athe long dimension of the pad 30 parallel to the circumference of peripheral edge of the core member and, as the crosshead 2Bv on the key 2 5 is also parallel to the peripheral edge of the coreA member 20, the'long dimension ofthe pad A30 is extended circumferentially of the core member y20 by the Vlength of the cross-head 2 8 on the key 25 while the short dimension of the pad 30 Vis free to fold without extension around the sides of the cross-head 28, Figs.l l, 2, and 3.

The cross-head 2B maybe equipped with dogs 29 FigQG, and when this typev of key is used the studs 214 are not used on the core 20. The dogs 29` are inserted intov the'side apertures 35 of the pad 30 when the key 25 is first inserted in the pad 30, via its'lorcking 25. The locking-head 21 is then runthrough the key-way 22 of the core member 2D until it lies inthe area of the receSSS 23. The key is then turnedA so that'its cross-head 28 lies parallel to the circumference of the core member 20, and this causes the pad 3,0 to turn and be positioned by the dogs29 with long dimension of the pad parallel to the circumference of the core member 20V thereby correctly positioning the pad 30 Figs. 1, 2 and 3, the locking headv head 21 and neck portion on the core member 20. This turning action'also from the component parts, placed in side by lside relationship as seen in Fig. 2 on a rotatable shaft,

such as the shaft 2|, and secured thereon by nuts or other` fasteningmeans. In usual useage,V

several wheels are generally employedsandtheir number generally runs from about 4 to 20 and complete assemblies are n As the pads'are inthe was.. llll anflbetwen even as high as 50 at one time on the same rotat-4 able shaft. When the wheels are pressed sidewise together on the shaft by the securing means, the cross-heads 28 on the keys25 are held in parallel position to the circumference of the core members 20 by the iibrous material 3| which forms Vthe pads 30 as the pads 30 fold around the cross-heads 28. This not only insures that the cross-head 28 extends the long dimension ol the pad 30 around the circumference of the core member 20, but also, at the same time, positions the locking-head21 within the recess 23 crosswise or in locking engagement with the key-way 22. In other words, when the wheels are placed 0n the shaft, all the individual parts and the locked up and properly positioned 'by merely tightening the means which secures the wheels on the rotatable shaft.

When the device is in operation and the rotatable shaft is turning at high speed, the pads 35 are subjected to great entrifugal'force 'and'they are urged radially outward from the center 'of theshafts rotation and assume a shape and position similar Vto thejposition and conngurationof the pads 30 in Figs. l and 2 which results in a circular working surface which'is periphera'lly continuous and uninterrupted.' vIt will benoted that this vis effected bythe extension of the long dimension or the pads itil by the 'cross heads on the keys 25, as the cross heads 128 lie Asubstantially end to end around the circumierence'of the ,'bycentrifugal force to vform a substantially complete circumference at the working surface 4,9 of the polishing wheel.

preferably oblong 0r oval in shape and only partially extended bythe cross Vhead circumferentially, the lstraight lines of centrifugal force cause the pads 3,0,to over-lap them- `selves or ruiile up, in their remaining area es# pecially adjacent their Outer'working 'surface 45 which provides a rough and durable surfacev to absorb polishing material and to do a polishing job.

a `When the polishing 'wheel assembly is rotating rapidly. as seen in Figi. 2, fluid air'enters `the 'recasses 2% indicated by the rwws arid this. air is thrown radially outwardly via the keyfway 22 the pads Sattached is provides a @filing medium. et.' the thereon.

working .Sarria/c@ le of the-eolienne wheels vthe 'circulation or duid air also eliminates humming and whistling. In the event that it is desired to use only one polishing wheel, side plates may be set Voneither side. of the core to. lock thevarious parts in Aposition Also, the polishing .pads may be position` able ,b yfrivetin'g or otherwise securing vthemto the key. "This and' many otherx additions, deletions, chan-ges, and `modifications. can be. made4 in thedisclosed device Without'departing fromzthe spirit! of the invention which islimited only the scope of the appendedclaims. We claim: v

`l.:.A polishing wheel `comprising an annular `core member, oblong. polishing pads hav-ing `a centrally located aperture and off-center apertures located on the long axis thereof, keys detachably attaching said. polishing' pads to. said core member via the centrally located; apertureof said pads, and means adapted to cooperatewikth the olf-center aperture of said pads to position 3155 'the long dimension of said padsparallel with 'the circumference of said corel member, and arcuate cross-heads on said keyslying substantiallyin end to end relationshipparallel to said core extending the long dimension of saidpads at said core thus spreading said pads on a complete circumference at the periphery of said coref'rom which circumference said pads are thrown radially outwardly .by centrifugal force to form a complete circumference at the working surface of the polishing wheel. f

2. A buing wheel of the typezcomprising a discular chuck adapted forrotation, a plurality of buffs and a plurality of key elements having bow, stem and bit portions for releasably en gaging said buffs and chuck to removably mount the buffs on said chuck and characterized in that said chuck has a plurality o f passagewaysex tendingradially from the discularperiphery of said chuck; each of said passageways "having a terminal `chamber portion intermediate the discular periphery and axis of rotation of said chuck and parallel extending and laterally communicating eye and slot keyway portions in axial communication with said terminal chamber portion and of cross-sectional dimensions and contour approximating those of the key element stem and bit portions, said keyway portions being adapted for guiding said key element stem and bit portions inwardly of the discular periphery of said chuck to locate the bit portion of said key element in the terminal chamber portion of said passageway; said terminal chamber portion having a surface extending parallel to a sector of the discular periphery of the chuck and adapted for engagement by the key element bit portion located in said terminal chamber upon rotation of the key element from an angular relation in which the stem and bit portions thereof register with said keyway eye and slot portions of the passageway whereby the key element will be restrained against movement relative to the chuck.

3. A buiing wheel of the type comprising a discular chuck adapted for rotation, a plurality of buffs and a plurality of key elements having bow, stem and bit portions for releasably engaging said buffs and chuck to removably mount the bulls on said chuck and characterized in that said chuck has a plurality of passageways extending radially from the discular periphery of said chuck, each of said passageways having a terminal chamber portion intermediate the discular periphery and axis of rotation of said chuck and parallel extending and laterally communicating eye and slot keyway portions in axial communication with said terminal chamber portion and of cross-sectional dimensions and contour approximating those of the key element stem and bit portions, said keyway portions being adapted for guiding said key element stem and bit portions inwardly of the discular periphery of said chuck to locate the bit portion of said key element in the terminal chamber portion of said passageway; said terminal chamber portion having a surface extending parallel to a sector of the discular periphery of the chuck and adapted for engagement .by the key element bit portion located in said terminal chamber upon rotation of the key element from an angular relation in which the stem and bit portions thereof register with said keyway eye and slot portions of the passageway whereby the key element will be restrained against movement relative to the chuck, a plurality of studs extending radially from the discular periphery of said chuck. each stud being located on one side of and inspaced proximity to oneof said passageways and adapted to be engaged by the bow portion of the key element whereby said key element bow and stem portions form with the engaged stud a conned space on the discular periphery of the chuck for containing a portion of one of said bulls.

4. A buirlng wheel of the type comprising a discular chuck adapted for rotation, a plurality of buffs and a `plurality oi' key elements having bow, stem and bit portionsfor releasably engaging said buffs and chuck to removably mount the buffs on said chuck and characterized in that said chuck has a plurality of passageways extending radially from the discular periphery. of said chuck; each ofV said` passageways havinga terminal chamber portion intermedite the discu lar periphery and of rotation of said chuck and parallel extending' `and laterally communieating eye and slot keyway portions `in axial communication with said terminal chamber poi-- tion and of cross-sectional dimensions and contour approximating those of the key element stem and bit portions, said keyway portions being adapted for guiding said key element'stem and bit portions inwardly of the discular periphery of said chuck to locate the bit portion of said key element in the terminal chamber portion of said passageway; said terminal chamber portion having a surface extending parallel to a sector of 'the discular periphery of the chuck and adapted for engagement by the key element bit portion located in said terminal chamber upon rotation of the key element from an angular relation in which the stem and bit portions thereof register with said keyway eye and slot portions of the passageway thereby the key element will be restrained against movement relative to the chuck, each oi said studs has a surface spaced a radial distance equal to the distance between the bow and bit portions of one of said key elements from the plane of said terminal chamber portions surface of the passageway with which said stud is associated as aforesaid, said stud surface being adapted to be engaged by said bow portions ofv the key element whereby the key element will be held against radial movement relative to the chuck when the bow portion engages said stud surface and the bit portion engages said terminal chamber portions surface.

5. A bufng wheel of the discular chuck adapted for of buffs and a plurality of bow, stem and bit portions for releasably engaging said buffs and chuck to removably mount the buffs on said chuck and characterized in that said chuck has a plurality of passageways extending radially from the discular periphery of said chuck; each of said passageways having a terminal chamber portion intermediate the discular' periphery and axis of rotation of said chuck and parallel extending and laterally communicating eye and slot keyway portions in axial communication with said terminal chamber portion and of cross-sectional dimensions and contour approximating those of the key element stem and bit portions, said keyway portions being adapted for guiding said key element stem and bit portions inwardly of the discular periphery of said chuck to locate the bit portion of said key element in the terminal chamber portion of said passage- Way; said terminal chamber portion having a, surface extending parallel to a sector of the discular periphery of the chuck and adapted for engagement by the key element bit portion located type comprising a rotation, a plurality key elements having 1in :said 'terminal Vchamber "upon Yrotation Vof `the key 'elementifrornganiangular relation in which the rstem :and -bit portions thereof register with -said keywayre'ye@andzslotiportions of Vthe'passageway'whereby the key element Will be restrained `against movement relativeV to thefchuck, each of said buffshas anopening `or dimensions'and-convtour approximating vthe cross-sectional dimen-y sions and contour 'of one vof said studs land adapted to receive said vstud therein whereby said buff may be 'impinged onsaid stud and pre'- ventedfrom movementrelative to the chuck when the key Velements bow portion `engages said stud.

"6..A polishing Wheel comprising an annular core vincludingV means vfor releasabie locking pad Y. attaching keys thereto, oblong polishing pads each having a centrally located aperture and at vleast one'side aperture disposed Yon vthe axis of thelong dimension of said pad, keys adapted to Ycoact With said means disposed in the central apertures of said pads, heads on said keys adapted Y to Vspread said pads relative to the circumferen- Y tial periphery of sai-d core, and s uds on said core positioned in therside'apertures of said pads fixing the long dimension 'of said pads relative t0 said heads and said core.

tures of saidpad-s, lheadson said keys adapted to spread said 'pads relative to the Acircumferential 10 'fperipheryiof said core, and dogs on said heads positioned in the side apertures of said pads v the long dimension of saidypads relative to said headsvand saidcore; y f y '1 U 1 JOSEPH vF. COULTIER.

YISABELLV J. LUPU.

n REFERENCES 4errno The following referencesnare of record in 'the o 'als ofthis patent:

UNITED STATES' PATENTS endr'ickson -s Feb.` i8, 1947 

